Grinding tool



. E. Lswv 'GRINDING TOOL Filed Dec.

Nov. 1, 1932.

Patented Nov. 1, 1932 JULIUS n ronw'v; or rrrILAnELrnIA, PENNSYLVANIA PATENTMOFFTICE GRINDING r001.

Application filed December 31, 1931. Serial No. 584,221.

This invention relates to grinding ma- .chines and particularly to the grinding or abrasive members for usetherein.

The present invention contemplates cer tain structural improvements in the type of abrasive members described and claimed in United States Letters Patent Nos. 1,095,963 and 1,095,994, granted to William D. Gherky, May 5, 1914. c

The object of'the invention is to provide an abrasive member as set forth, having certain novel features of construction relating to the manner of supporting said member 1n the grinding machine. 4

Another object of the invention 15 to provide an abrasive member as set forth embodying certain structural features preventing uneven wearing of the surfaces of sa d member, resulting in the prolongation of the period of utility thereof. 7

Other features and details'of construction are set forth hereinafter and shown in the accompanying drawing, in which:

Figure 1 is a view in perspective of the abrasive member made in accordance wlth the invention; and

Fig. 2 is a fragmentary view in section on line 22, in Fig. 1.

Heretofore, and as disclosed in the aforementioned United States Letters Patent the abrasive or grinding members have been suported in alignment, and raised and lowered by means of a common bar. This supportlng bar, in the majority of instances, is composed of two halves each extending longitudinally along the top surfaces of the grinding members and resting thereon, As a result of the continued reciprocatory motion of the common bar and the grinding members, the supporting assembly has a tendency to become loosened and the very slight reciprocation of the bar and the grinding element, with respect to each other, results in the formation of uneven grooves in the upper surfaces of the grinding elements, leaving said elements loosely supported, which results in the bottom or grinding surface becoming unevenly worn with use, requiring the grinding elements to be discarded a considerable time prior to the normal extent of utility thereof.

shown.

The present invention is directed to certain structural improvements in grinding elements, the incorporation of which precludes the formation of grooves in the upper surface of the members through wear and g'eatly increases the period of utility there- 0 Referring now more particularly to the drawing the abrasive device made in accordance with my invention comprises the abra sive member or brick 1, the body thereof be ing provided with a stud hole 2 made therein,

fwhilethe brick is yet soft, during the process plate 4' positioned overlying the upper end surface of the brick 1, the plate 4 in the present instance being provided with a trough or channel 5 arranged for reception by the aforementioned channel 3 in the brick body.

The surface plate 4 in the present instance is further provided with an aperture 6 formed in the trough or channel 5 and positioned in such a manner that when the said plate 4 rests on the upper surface of the brick 1, the aperture 6 is in al gned superimposed relation with the stud hole 2 in the brick body. The provision of the surface plate 4 as in the present case is effective to take any wear resulting fromthe slight reciprocatory movement between the support bar and the grinding bricks, preventing the formation of uneven grooves therein and substantially prolonging the period of utility;

r1 beaded stud 7 is passed through the aperture 6 in the plate 4 and inserted in the stud hole 2 in the brick body 1, with the expanded lower end 8 at the bottom'thereof,

To provide a substantially strong rigid construction the brick, Wear plate, and the stud are respectively attached to each other by pouring a molten mass 9 of babbitt, lead or' other material into the stud hole 2 from externally'of wear plate 4,'a quantity of the molten metal being poured to permit a rise supporting means as an integral and rigid above the wear plate 4 sufiicient to fill the channel 5 thus securing the wear plate 4 rigidly on the upper surface of the brick 1, and forming a substantially integral abrasive or grinding unit.

While the present invention has been disclosed for the purposes of description it is not intended to be limited thereto except as set forth in the appended claims.

I claim:

1. An abrasive element for use in a machine as set forth, comprising a body having a studhole therein and a channel diametri-' cally of sa d studhole extending between two opposed side faces of said body, a guard plate overlying said body having a channel arranged for reception by the channel in the body, and an aperture in superimposed alignment with the studhole, a stud extending through said aperture in the guard plate and into the studhole, and means filling said studhole and the channels, effecting a substantial- 1y integral unit for abrasive purposes.

2. An abrasive element for use in a machine as set forth, comprising a body having a studhole therein, a guard plate overlying said body having an aperture in alignment with the studhole, a stud extending through said aperture in the guard plate and into the studhole, and means filling said studhole. effecting a substantially integral and rigid unit for abrasive purposes.

An abrasive element for use as described, comprising a block of abrasive material. having one face constituting a grinding face and another a fastening face, the latter provided with an undercutrecess for the reception of fastening means, fastening means in said recess, a plate overlying the fastening face, and material cast Within said recess around said fastening means and retaining the fastening means, the plate, and the bodysubstantially integral.

4. An abrasive element for use in reciproeating grinding machines compr sing ablock of abrasive material having a grinding face and a fastening face opposite thereto, a guard plate overlying the fastening face and rigidly secured thereto and preventing disintegration thereof by rubb ng friction and means extending through the plate and internally of the block for supporting said block in the machine.

An abrasive element for use in reciprocating rinding machines comprising a block of abrasive material having a grinding face and a fastening face opposite thereto, a guard plate overlying the fastening face and pre venting disintegration thereof by rubbing friction, means extending through the plate and internally of the block for supporting said block in the machine, and means respec-. tively securing the block, guard plate and structure.

6. An abrasive element for use in a machine as set forth comprising a body having astudhole therein and a channel diametrically of said studhole extending between two opposed side faces of said'body, a guard plate overlying said body having a channel arranged for reception by the channel in the body, and having an aperture in superposed alignment with said studhole, a stud extend ing through said aperture in the guard plate and into the studhole,and means for securing the stud in said block.

JULIUS E. LOElVY. 

